Juniper Junos OS up to 24.4R1-S3/24.4R1 CLI Command unusual condition

Summaryinfo

A vulnerability was found in Juniper Junos OS up to 24.4R1-S3/24.4R1. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the component CLI Command Handler. The manipulation leads to unusual condition. This vulnerability is documented as CVE-2026-33786. The attack needs to be performed locally. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Juniper Junos OS up to 24.4R1-S3/24.4R1. It has been rated as problematic. This issue affects an unknown function of the component CLI Command Handler. The manipulation with an unknown input leads to a unusual condition vulnerability. Using CWE to declare the problem leads to CWE-754. The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product. Impacted is availability. The summary by CVE is:

An Improper Check for Unusual or Exceptional Conditions vulnerability in the chassis control daemon (chassisd) of Juniper Networks Junos OS on SRX1600, SRX2300 and SRX4300 allows a local attacker with low privileges to cause a complete Denial of Service (DoS). When a specific 'show chassis' CLI command is executed, chassisd crashes and restarts which causes a momentary impact to all traffic until all modules are online again. This issue affects Junos OS on SRX1600, SRX2300 and SRX4300: * 24.4 versions before 24.4R1-S3, 24.4R2. This issue does not affect Junos OS versions before 24.4R1.

The advisory is shared at kb.juniper.net. The identification of this vulnerability is CVE-2026-33786 since 03/23/2026. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 04/10/2026).

Upgrading to version 24.4R1-S3 or 24.4R2 eliminates this vulnerability.

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Productinfo

Type

• Router Operating System

Vendor

• Juniper

Name

• Junos OS

Version

• 24.4R1
• 24.4R1-S3

License

• commercial

Website

• Vendor: https://www.juniper.net/

CPE 2.3info

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CPE 2.2info

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